Door controlling system



Jan. 9, 1940. w. F. WEATHERS DOOR -CONTROLLING SYSTEM 5 Sheets-Sheet 2Filed Oct. 10, 1956 W 0 4 5 J 41 5 m m/m? 8 5 5 3 6 L 5\ Qm 7 3 4 578 41\ @5 E a 1 WWW (7 1 i 4 T BET mi M. 5, 5 i=6 m We: r/"en W ATTORNEY.

Patented Jan. 9, 1940 PATENT OFFICE 2,188,311 'nooa CONTROLLING srs'muWarren F. Weathers, Detroit, Mich'., assignor to Horton ManufacturingCompany,

Detroit,

Mich., a corporation of Michigan Application October 10, 1936, SerialNo. 105,058

3 Claims.

My invention pertains to automatic door opening systems and moreparticularly to automatic garage door systems for conveniently openingthe door of a garage as the automobile approaches and for closing andlocking the door thereafter.

In the previously known automatic garage door opening systems with whichthe applicant is familiar, it was necessary to install and maintain acomplicated system comprising a plurality of limit switches actuated bythe door in conjunction with electro-magnetically operated reversingswitches and other complicated apparatus. Also many such systems haverequired installation of live wires under-ground, with the necessity ofexpensive installation to meet the safety code and local ordinances.Accordingly such systems as previously installed were very expensive andrequired considerable maintenance attention whereby the conveniencewhich the operator hoped to derive from the automatic installation wasnullified by the additional inconvenience involved therein.

It is accordingly an object of my invention to provide a simplifiedgarage door opening system which involves a minimum amount of apparatusand moving parts, which is simple to install and maintain, which ispositive in its operation and which may be conveniently operated from anapproaching automobile.

It is a further object of my invention to provide a simplified automaticgarage door opening system which may be operated by momentarily inducedelectrical impulses either from an approaching automobile or from anadjacent house, whereby the control circuit part of the system isnormally dead and it is not at any time connected with the service lineseither directly or indirectly, as through transformers or the like.

It also is an object of my invention to provide an automatic garage dooroperating system comprising a door operating motor, a garageilluminating lamp, a reversing switch actuated by the movement of thedoor between its extreme positions and a relay responsive to an initialimpulse for energizing the circuits prepared by the door operated switchfor starting the motor to open the door and to energize the lamp tosimultaneously illuminate the garage while the door remains open, therelay also responding to a second impulse for energizing the preparedcircuits for closing the door, the lamp being deenergized by the finalaction of the door operated switch.

Another object of my invention is to provide a two-door garage openingsystem which operates responsive to the selected polarity ofelectromagnetically induced impulses for selectively opening either oneof two garage doors as an automobile approaches.

It is also an object of my invention to provide for use in my automaticdoor opening system a 5 sensitive impulse responsive relay comprising apermanent magnet of U-shaped conformation, a pair of pole tips disposedbetween the extremities thereof for defining an air gap therebetween,

an annular actuating coil encircling the pole tips 10 adjacent said airgap, a reed for supporting the coil, biasing means for positioning thecoil on said reed adjacent the air gap, an armature of magnetizablematerial disposed on said reed, an

adjacently disposed holding solenoid, and contact 15 embodiments, whenread in connection with the 25 accompanying drawings, in which:

Fig. 1 is a diagrammatic view illustrating the arrangement of anautomatic garage door operating system inv accordance with my invention;

Fig. 2 is a side elevational View of the impulse actuated relay for usetherein;

Fig. 3 is a plan view thereof;

Fig. 4 is a transverse sectional view through the reed and one of thebridging contacts thereon;

Fig; 5 is a perspective view of the manual im- 35 pulser forinstallation in an adjacent house;

Fig. 6 is a cross-sectional view therethrough on line 6-8 of Fig. 5;

Fig. '7 is a diagrammatic view of an embodiment of my automatic garagedoor operating system 40 arranged for selectively opening either one oftwo garage doors in response to induced impulses of "selected polarity;

Fig. 8 is a side elevational view of a modified embodiment of my impulseresponsive relay 45 adapted for use in my two doorsystem;

Fig. 9 is a diagrammatic view showing modified motor connections; and

Fig. 10 is a fragmentary diagrammatic view showing how the controlcircuits may be modifled for controlling a split phase motor.

Referring more particularly to Fig.- 1 of the drawings, I haveillustrated my automatic system as arranged for automaticallycontrolling a shunt.

wound garage door operating motor I which power transmitting means, todrive a threaded shaft 5 for opening or closing a garage door 1 which isoperated from the threaded shaft 5 by means of an arm 5 comprising athreaded nut II which travels along the shaft. 7 v

For preparing the circuits in accordance with the position of the door,I provide fingers l3 and it which project laterally from opposite edgesof the door for engaging a switch arm I5 01 a reversing switch l5. Thereversing switch l5 comprises the movable arm II which is pivotallymounted at one end upon a pivot pin H on a baseboard 15. The reversingswitch is suitably mounted in a position, preferably overhead, where'the movable end of the pivot switch arm I5 is alternatively engaged bythe door carried fingers l3 or l4 for moving the switch lever betweenits two alternative circuit closing positions. The pivoted switch arm I5is made of some non-conducting material, such as fiber board, or hardrubber for example, and carries four electrically conductive contactmembers II, 23, and 21 which are mounted in spaced relation thereon, forcontrolling electrical circuits, to be subsequently traced anddescribed.

Upon the base l5, a set or stationary contacts 29, 3|, 33 and 35 isprovided and these are positioned for respective engagement by themovable contacts 2|, 23, 25 and 21 when the arm is moved to itslowerposition as shown. Adjacent the opposite side of the movable switcharm N. I provide four stationary contacts 31, 35, 4| and 43 disposed forrespective engagement by the movable contacts 2|, 23, 25 and 21 when theswitch arm is turned up to its alternative position by a movement of thedoor which carries the finger |4 thereon into engagement with themovable end of the switch arm. By this simple arrangement all thenecessary circuits 01 my control system are automatically prepared forthe next operation by the movement of the door itself.

For this purpose or controlling the energiza tion of the electricalcircuits which have been prepared by the movement of the switch arm l5by the door, and which will be subsequently described and traced, Iprovide a sensitive impulse responsive relay 45, shown in Figs. .2, 3and 4. The impulse actuated relay 45 which I have provided forcontrolling my door operating system comprises a base 41, of Bakelite,hard rubber or other insulating material, upon which a powerfulpermanent magnet 49 of U-shaped conformation is mounted. The permanentmagnet 49 is mounted upon the base 41 with one leg adjacent thereto andthe other vertically disposed and secured by screws or other fasteningmeans. Be-

- tween the ends of the legs of the magnet, I provide a pair of poletips 5| of magnetic material which are preferably of circularcross-section and suitably spaced for defining a small air gaptherebetween. The air gap is filled by a disk 52 of copper, brass, orother non-magnetic material whereby the pole tips 5| are smoothlyjoined. Upon the base 41 a pair of brackets 53 are mounted in spacedrelation on opposite sides of the permanent magnet. The brackets 53 areprovided with angularly turned foot portions 54 which are clamped on thebase 41 by terminal posts 55 secured by screws through the bottom in theusual manner.

The movable member of my inmpulse controlled relay comprises a reed 51which consists of a strip of aluminum or other non-magnetic mate- I2,185,811 operates through a suitable gear train 3, or other rial whichis pivotally mounted at one end upon a block 55 of Bakelite havinginsulated pivot pins .55 projecting from opposite sides and to which itis secured in any suitable manner as by rivets. The portion of the reed51 adjacent the pole tips 5| is provided with a pole receiving aperture55, indicated by dotted lines in Fig. 3. The aperture is stamped outwith a larger diameter than the pole tips 5|, and at the same time thisoperation provides a form for supporting a solenoid 5| in encirclingrelation around the pole tips 5|. For winding the solenoid 5|, enameledwire is preferably used and the leads 53 from the annular solenoid areextended along one face or the reed 51, to which they may be secured, asby cementing, and they are soldered to respective ones of the pair ofpivot pins 55. The ends of the insulated pivot pins 55 are received byand Journalled in apertures in the upper ends of the brackets 53 wherebythe terminal posts 55 are conducti'vely connected to the ends oi. thesolenoid 5|.

Encircling the pivot pins 55, on opposite sides '01 the reed 51, are apair of delicate centering springs 55 and 55. The outer end of thespring 55 engages an adjusting stop 55 which may be rotatably adjustedfor resiliently biasing the pivoted reed to a suitable centeredposition. The stop 55 is apertured to ride freely over the pin 55 whichis journalled in the standard 53. The end of the spring 55 presses thestop 58 against the standard 53 where the friction holds it in adjustedposition for tensioning the spring 55. On the movable end or the reed 51an armature 51, or magnetizable metal such as iron, is secured byriveting. Under the armature 51 an electro-magnet 59 is mounted on thebase 41 with its upper pole 1| adjacent to and spaced slightly from thearmature member 51. a

The pivoted reed member 51 carries a pair of bridging contacts 13 and 15comprising metallic strips which extend transversely across the reed inspaced relation. As shown in Fig. 4, each contact member is secured ininsulated relation by means of a piece of Bakelite 15 which is securedto the reed 51 by means of rivets 18 extending through the intermediateportion thereof. By means of rivets the outer ends of the strip ofBakelite are secured to the bridging contact member 13 which is thusinsulated from the reed 51.

A pair of stationary contacts 11 and 19 are mounted on opposite sidesofthe lower leg of the magnet in suitable position forsimultaneousengagement by the ends of the contact 13 moving downwardly. Similarlystationary contacts 8| and 83 are mounted on the opposite sides of themagnet for engagement by the opposite ends of the contact member 15.Each of the stationary contact members comprises an upstanding striphaving an angular foot 82 abutting the insulating base 41 and secured byterminal posts 84 secured thereon by screws in the usual manner.

The movable reed 51 being non-magnetic is uninfiuenced by the magnet 49and it normally assumes a position determined by the adjustment of thebiasing springs. When an electric current ispassed through the annularcoil 5| adjacent the air gap, the coil and the associated reed aredeflected upwardly or downwardly depending upon the direction of currentnow,

By the disposition of the acthrough the coil. tuating solenoid 5|encircling the pole tips and air gap a very sensitive arrangement isprovided whereby the reed may be deflected in response arsaan to afeeble electric current impulse of short duration. when a momentaryimpulse of proper polarity is impressed on the coil II, in a manner tobe subsequently set forth. the reed deflects downwardly carrying itsbridging contacts 13 and It to bridge their adjacent stationary contactsfor completing the energization of circuits which have been prepared bythe door operated reversing switch It.

I'br this purpose a service conductor LI, of a convenient direct currentor alternating current service line. is connected to the stationarycontact ll on the impulse responsive relay 45. From the main lineconductor LI, a conductor 55 is connected to the stationary contact 55oi the reversing switch. From the conductor 85 a conductor 51 isconnected to the stationary contact it from which a conductor 59provides a permanent connection with the stationary contact 31 adjacentthe upper edge of the switchboard I9. Extending from the conductor 81 isa conductor 9| which is connected permanently to the movable contactmember of the reversing switch. It will thus be seen that the main lineconductor LI is permanently connected with the stationary contact 8| ofthe relay and also with the stationary contacts ll, and 31 01' thereversing switch and also with the movable contact member 25 of thereversing switch.

The other side of the service line comprising the main line conductorL2, isconnected directly with the stationary contact 11 on the relay.From the main line conductor L2, a conductor 53 extends to connect witha conductor 95 in permanent connection, with the stationary contact 29which through a conductor 91 is also permanently connected with thestationary. contact 39 adjacent the upper edge of the switchboard. Theconductor 95 is also extended for permanent connection with one oi theterminals 58 of the door operating motor I. By this arrangement thesecond main line conductor L2 is permanently connected with contact 11on the relay, stationary contacts 29 and 39 on the reversing switch andone of the motor. energizingterminals, 98.

On the receiving switch I5, the stationary contacts 32 and 4I,adjacently disposed on opposite sides of the pivoted arm I5, areconnected together through a conductor IIII which also extends toone,end of the holding electro-magnet 85 on the impulse responsive relay45. From the other end oi the electro-magnet 58 on the relay, aconductor I03 is permanently connected to the contact member 19. Fromthe stationary contact 43 adjacent the upper edge oi? the reversingswitch a conductor I05 is permanently connected to the contact member 83on the relay 45, and from the conductor I05, a conductor I01 isconnected to another one of the motor energizing terminals I09 of themotor. From the movable contact member 2I on the reversing switch aconductor III is connected to an energizing terminal II! on the motorand from the other movable contact 22 on the reversing switch, aconductor H5 is connected to the other energizing terminal II1 on themotor.

A flood lamp 9, which is provided for illuminating the gargage, isconnected on one side directly to the main line conductor L2 through aconductor I2I. The other side of the flood lamp II! is connected througha conductor I28 to the movable contact 21 on the reversing switch.

In accordance with my invention, I control my automatic garage dooroperating system by inducing a momentary electric current impulse in acoil I25 which is wound upon a large iron core I21 and embedded in theconcrete or ground of the driveway over which the automobile passes tothe garage. For this purpose the automobile carries a strongelectromagnet I29 having a large iron core I3I which is so mounted onthe vehicle that it passes over in the vicinity of the coil I25 buriedin the driveway. The winding of the inducing electromagnet I29isconnected by a conductor I 38 to one terminal of the storage batteryI55 01' th'e'automobile. The other end of the automobile electromagnetI2! is connected by a conductor I31 to one terminal oi a manual switchI39, and from the other terminal thereof a conductor I is connected tothe other terminal oi the car carried storage battery I25. Theconnections thus established, must provide current of suitable polarityto the electromagnet I25 whereby a current impulse of proper polaritywill be induced in the buried coil I25. This is readily ascertained bytrial and reversing the connections on the electromagnetI29 iinecessary.

As the driver of the automobile approaches the garage, he closes themanual switch I" thereby energizing the car carried electromagnet I20.When the ear passes over the buried coil I25 a current impulse of properpolarity is induced therein which passes by way of a conductor I42 tothe actuating solenoid 5| on the relay returning by way of conductorsI43 and I45 to the other end of the buried coil. The conductors I43 andI45 being normally dead and not at any time connected with the servicelines either directly or indirectly are extended conveniently through anauxiliary controller I41 in the house without any danger or hazard.

In the auxiliary controller I41, I also provide a manual impulsercomprising a solenoid winding I 5| disposed ona tube I53 of non-magneticmaterial which receives a permanent magnet I55 disposed therein, asvmore clearly shown in Figs. 5 and 6. The permanent magnet I55, which. ispreferably of a strongly magnetizable magnet steel alloy, is disposed toslide axially through the solenoid winding III and to project throughthe front panel I51 of a box I58 in which the solenoid is mounted. Tonormally hold the permanent magnet in its projected position, acompression spring I5I is provided reacting between its innermost endand the bottom of the enclosing box,

'The auxiliary controller I41 com-prises a manually operable switch I49whereby the impulsing circuit may be opened at night, or any other time,to prevent unauthorized opening of the garage door. The manuallyactuable switch I 48 is mounted upon the front panel I51 of theenclosing box. A pair of terminal ports I52 and III are also mountedupon the front panel I51 of the auxiliary controller for convenientlyconnecting it to the conductors I43 and I45 of the impulsing circuit.The circuit elements of the controller are connected in series relationin the controller box, as diagrammatically represented in Fig. 1.

The auxiliary controller is mounted in the.

any time connected with the service lines either directly or indirectly.

The manual'impuiser of the auxiliary controller I37 is actuated byquickly depressing the permanent magnet I55 into the solenoid windingISI. This generates a short current impulse in the coil for energizingthe coil 6| on the relay. II, when the system is first installed, theimpulse thus generated is not of the correct polarity for moving thereed 31 of the relay in the proper direction to bridge the stationarycontacts, this can be conveniently corrected by changing the connectionsof the circuit wires on the terminal posts I62 and I33 of the auxiliarycontroller.

The operation of my automatic garage door controlling system isaccomplished as follows: The position of the parts, as shown in Fig. 1,is with the garage door in the open position, the reversing switch I3has been moved to a position which corresponds to the open position ofthe door by the engagement of the finger I3 with the pivoted switch armI5. In this position the door is open, and the garage flood lamp 3 isenergized for illuminating the garage. The circuit for the lamp may betraced from main service line LI, conductor 35, contacts 35 and 21,conductor I23 to one side of the lamp II3 continuing from the other sideof the lamp through conductor I2| to the main service conductor L2.

With the elements of the system in the positions described above, withthe garage door open and the lamp lighted, the operator is prepared totake his car out of the garage. The driver of the car closes the switchI33 on the car to energize the car electromagnet I23, and as the carpasses out of the driveway this induces a momentary impulse in the coilI25 buried in the driveway which, as previously explained, is of properpolarity for energizing the movable coil 6| on the impulse responsiverelay 45 to move its pivoted reed 51 to its circuit closing position.

When the relay coil 3| is energized by th momentary impulse, the movablebridging contact l3 bridges the stationary contacts 11 and I3 of therelay thereby energizing the holding coil 63 which attracts the armature61 and holds the pivoted reed 51 of the relay in its circuit closingposition.

The stick circuit for the holding solenoid 63 may be traced from mainline LI through conductors 85, 31, and 3|. thence through movablecontact 25 to stationary contact 33 on the reversing switch I3, thenceby way of conductor IIII to the holding solenoid 53. From the other sideof the holding coil, its energizing circuit continues through aconductor I33 thence through contact members I3, I3 and 11 on theimpulse responsive relay to the other main line L2.

By this arrangement, the impulse responsive relay holds itself inclosing position until the energizing circuit of the holding solenoid 63is broken by the movement 01 the movable contact member 25 of thereversing switch which does not take place until the door I has beenmoved to its extreme alternate position which in this example is theclosed position.

The door operating motor I is also energized by this holding operationof the impulse responsive relay 45 through the engagement of itsbridging contact I with the stationary contacts 3| and 83. This motorenergizing circuit may be traced from main service line LI, contacts 3|,i5 and 33 of the relay, thence by way of conductors 535 and it? to themotor terminal W9,

which may be connected with one side of the armature. winding 01' themotor. From the other terminal 33 of the motor armature, the energizingcircuit is completed through conductors 35 and 33 to the other main lineL2 whereby the door operating motor is started. The direction ofoperation of the door operating motor I is determined by the connectionof its field terminals H3 and III through conductors III and H5respectively to the movable reversing contacts 2| and 23 of thereversing switch. In the position shown, this circuit may be traced frommain line LI by way of conductors 35 and 31, through contact members 3|and 23 of the reversing switch, thence by way of conductor 5 to motorterminal I". From the other motor terminal II3, this energizing circuitcontinues through conductor II I. thence through contact members 2| and23 on the reversing switch, thence by way of conductors 35 and 33 to theother main line L2. From the terminals H3 and II! of the motor, thefield may thus be energized reversely to operate the motor in reversedirections in accordance with the position of the re- 2 versing switch.

As the motor operates to move the door I arm I5 ofthe reversing switchas the door approaches its extreme closed position. The reversing switcharm I5 is thus moved upwardly to engage the alternate set of stationarycontacts 31, 33, 4| and 43. As this occurs the movement of the contactaway from the stationary contact 33 interrupts the energizing circuit ofthe holding coil 33 on the relay which drops out thereby opening the.motor energizing circuit which was completed through contacts. I5, 3|and 33.

This operation deenergizes and stops the motor when the door has reachedits extreme closed position. The movement of the contact 2! of thereversing switch away from stationary contact 35 also breaks the lampcircuit and extinguishes the flood lamp 9 in the garage when the door isclosed.

When the car returns to the garage, the driver again closes the switchI33 on the car and thus energizes the inducing magnet I23 from the carstorage battery I35 to provide proper polarity for inducing impulses inthe buried coil I25 in the driveway. As the car approaches up thedriveway, the current impulse thus induced is impressed upon the movablecoil SI of the relay through impulse transmitting circuit, previouslytraced. This moves the pivoted reed 51of the relay to its circuitclosing position whence the bridging contacts 13 and I5 thereon bridgethe adjacent stationary contacts to complete the energization of thecircuits which were prepared by the final movement of the switch arm I50f the reversing switch by the door.

By its initial movement, the bridging contact 13 on the relay closes astick circuit for the holding electromagnet 63 for the purpose and inthe manner previously described, except that it is now the upperstationary contact M on the door actuated switch which is now utilizedfor completing the stick circuit from conductor MI through the movablecontact 25 of the reversing switch. The engagement of the bridgingcontact I5 of the impulse responsive relay with its associated contacts3i and 33 again completes the motor starting circuit for operating themotor in the manner previously traced. The motor now operates in theopposite direction for opening the door because the energization of itsterminals II! and III has been reversed by the movement of the connectedcontacts 2I and 22 of the reversing switch into engagement with thestationary contacts 31' and 26 which are reversely connected from thecontacts 26 and II through conductors 91 and 86.

The motor now operating in the reverse direction moves the garage door 1toward its opened position and when this position is finally reached thefinger I3 on the door engages the end of the switch arm I5 thus drawingit down to its original full line position as previously described.

Also the engagement of the bridging contact 15 with the stationarycontact members 6| and 82 on the relay immediately energizes the floorlamp H9 in the garage. This circuit may be traced from main line LI,contact members 6|. 15 and 63, thence by conductor I05 to the stationarycontact 43 on the door actuated reversing switch, thence by the movablecontact 21 and through the conductor I23 to one side of the flood lampII6 the other side of which is permanently connected to conductor I2I tothe other main line L2.

The flood lamp is thus immediately energized as soon as the dooroperating system starts, and the lamp continues illuminated during theopening of the door. As the door approached its opened position and theswitch arm I5 of the reversing switch moved downwardly, the movable lampenergizing contact 21 was thereby disengaged from its contact 43, butthis only caused a momentary flickering of the flood lamp because thelamp was promptly reenergized when the contact 21 engaged the stationarycontact 25 thereby completing the circuit from main line LI throughconductor 85 and stationary contact 35. The flood lamp thus remainsenergized after the garage door has opened and while the door remainsopened as previously described the flood lamp remains completelyenergized during the operation of closing the door and until the door iscompletely closed which enables the operator to observe that the door iscompletely closed.

When the operator enters the house, he may then, or at a later time,conveniently close the garage door by operating the auxiliary controllerI41. For this purpose he merely depresses the permanent magnet I 01 themanual impulser quickly into the coil I5I. As previously explained, thisprovides an impulse of the proper polarity for energizing the movablecoil 6| of the polarized relay to move the pivoted member 51 to circultclosing position for operating the motor.

After the door operating system has operated to move the door 1 toclosed position, the finger I4 on thedoor engages the reversing switchI5 thus moving it up to its dotted line position and preparing thecircuits for the next operation. This operation of the reversing switchI6 also deenergizes the flood lamp in the garage.

By opening the manual switch I46 on the auxiliary controller, theoperator can now render the impulsing circuit ineffective whereby it cannot be opened by the approach of any other car, even if it is equippedwith an impulsing electro-magnet, and by this operation the garage dooris eflectively locked for the night.

In the morning it is only necessary for the operator to first close theswitch I49, and by thereafter punching the permanent magnet I55 in theimpulsing solenoid "I, he may convenpreaches.

the impulse responsive relay I6 I which is utilized iently open thegarage door preparatorytc drivingout.

In providing'forthe control of the doors of a two door garage, it is ofcourse only necessary to provide an independent one of my door operatingsystems for each door ii' there-are two separate driveways approachingthe doors. However, in accordance with another embodient of myinvention, I have provided a two-door garage door operating systemwhereby it is unnecessary to duplicate all the parts, and asingleimpulse responsive relay and a single impulsing coil and circuitmay be utilized for selectively operating either one of the garage doorsas a car ap- Such a system isshown in Fig. '1, and

for selectively operating either door, is also shown in Fig. 8.

My impulse r'esponsive relay I 6 I for selectively operating either oneof a pair of garage doors is quite similar to that previously describedin the single door system, and to the corresponding elements similarreference characters have been applied. To this construction however itis necessary to add several elements to provide a selective control andfor this purpose, I provide a strip I 63 of insulating material, such ashard rubber,

fiber, or a phenolic condensation product, which is mounted on top ofthe upper leg of the U- shaped permanent magnet 49. The strip ofinsulating material I63 may be secured to the permanent magnet in anysuitable manner as by cement, or a clamp, and is of suitable length toproject beyond the end of the magnet a distance substantially equal tothe extended portion of the baseboard 41. On the extended end of theinsulation strip I63, I secure a second holding electro-magnet Icomprising a magnetizable core I61 which extends downwardly adjacent themovable end of the reed 51. For holding the pivoted reed 51, the portionof iron 61 provides a sufiiclent armature.

Also I provide the selecting relay I6I with additional pairs ofstationary contact members Ill and I13, I15 and I11 which dependdownwardly from the insulation strip I 63 in insulated relation onopposite sides of the magnet 49. A terminal post I18 is provided forconvenient connection on each contact member. The movable bridgingcontacts 15 and 15 which project transversely from the movable reed 51,as previously described. are utilized in the uppermost position forbridging these additional stationary contacts.

The other elements of the two-door selective relay I6I are similar tothat previously described in the single door controlling system, and itis operated selectively for'operating either one of the garage doors byenergizing the movable coil 6I thereon by current impulses, the polarityof which is suitablyselected to predetermine which door is to beoperated. I In my two door control system, the movable coil 6! of therelay is energized from the impulse inducing coil I 25 buried in thesingle driveway approaching the garage. From the buried coil I25 animpulse transmitting circuit is extended to the relay coil I6I by way ofthe conductors I42, I43 and I45 through a solenoid controller I41 whichis mounted in the house adjacent to the garage, in the same manner aspreviously described with reference to the single operating system.

In order to selectively operate my two door system, I energize theinducing electro-magnet I26, carried by the car, from the car storagebattery I85 through a manually actuatable reversing switch I88, of anywell-known construction, whereby the polarity of the inducingelectromagnet may be conveniently reversed. By manually operating thereversing switch to one position,.a current of a predetermined polarityis provided for energizing the electro-magnet I29, and by moving it toan alternate position, current of reverse polarity is supplied forenergizing the electro-magnet I29. In its normal position the movableblades of the manual reversing switch are disengaged from its stationarycontacts, and the car carried electro-magnet I29 is deenerglzed.

The garage door shown at the right hand side of Fig. 7 corresponds tothe door 1 and its actuating motor I, the associated reversing switch l5and the conductors thereof correspond to the similar elements of Fig. 1,and they have been designated by similar reference characters. Theoperation of the door 1 by the motor I is controlled by the successiveoperations of the reed 51, of the relay to the right-hand position, inthe same manner as in the previous embodiment, and which will not berepeated. In the two door system, a ci ar actuating arrangement has beenshown for operating the reversing switch I6 comprising a bell crank I85having one arm connected with a link I81 which at its upper end connectswith the end of the switch arm I5 with the reversing switch. The otherarm of the bell crank I85 projects for operative engagement by theflngers l4 and I8 associated with the garage door 1 whereby thereversing switch I8 is thrown alternatively to its extreme positions inaccordance with the movements of the door.

In the two door system, when the impulse responsive relay IGI issuccessively energized by impulses of suitable polarity for throwing thereed 51 toward the righthand side, as predetermined by moving the manualreversing switch I88 to a proper position before driving the car overthe buried coil I25, the relay operates to complete the circuits whichhave been prepared by the reversing switch I5 for operating the motor Iand the flood lamp H9, in the same manner as previously described withreference to the two door embodiment.

For operating the second door 291, I provide a door operating motor 2IIIwhich drives a threaded shaft 205 for reversely operating the secondgarage door to which it is threadably connected by a member 209. Forreversably controlling the door operating motor 2III in accordance withthe position of the door 208, I provide a reversing switch 2 I 6 whichis similar in construction and operation to that previously described.The switch 2I6 is similarly actuated by a link I81 interconnected fromthe movable end of the switch arm to one arm of a bell crank I85. Thesecond door 201 also carries-projecting members I8 and I4 for engagingthe bell crank I85 to correspondingly operate the reversing switch 2I6.To selectively control the second door operating system, circuits areprovided as follows: The additional contact I1I provided on my two doorselective relay I6I is connected through a conductor 2I1 to one end ofthe holding electro-magnet I65 which operates to hold the movable reed51 of the relay in its left-hand position, when it is selectivelyoperated. The energizing circuit of the holding electromag'net iscompleted through the reversing switch 2I5 in a manner substantiallyidentical with that previously described.

When the relay lti is deflected andlocked in its left-hand position, thebridging contact 15 engages the stationary contacts I15 and I 11 of therelay for completing the circuitof the door operatlng motor I in amanner substantially similar to the operation of the door operatingmotor I for the right hand deflections of the relay.

For this purpose, the main line conductor LI is extended to contacts221, 229, 28I and 288 on reversing switch 2I5, from the added stationarycontact I15 of the relay. The second main line conductor L2 is extendedfrom the added con- 9 tact member I18, and is connected by conductor 285with one of the motor terminals 281. The conductor 285 also extends toone side of a flood lamp 288 which is positioned for illuminating theother side of the garage. From the other side of the flood lamp, theconductor 289 is extended to connect with the movable contact 2 carriedby the pivoted switch arm 2I5.

From the motor energizing terminal 2, a conductor 248 is connected tothe stationary terminal 245 on the reversing switch. From conductor 248,a conductor 246 is connected to the added stationary terminal I11 on the'relay. From extended main line L2, the conductor 255 is connected tostationary contacts 251 and 259 on the reversing switch. The other pairof motor energizing terminals 248 and 245 are connected throughconductors 241 and 249 respectively to movable terminals I and 258 onthe pivoted switch arm 2I5 for reverse energization to reversely operatethe motor for opening and closing the door.

In operation the driver of an automobile approaching up the singledriveway to the garage throws the manual reversing switch I88 in such adirection as to properly energize the car carried electro-magnet I29 sothat as it is carried over the buried coil I25, a momentary currentimpulse is induced therein of suitable polarity for drawing the reed 51of the impulse responsive relay I6I to engage either set of stationarycontacts for selectively opening either door as desired. The relay reed51 is then held in its actuated position by the adjacent holding coil 89or I85 depending upon the direction of its deflection. As soon as it isascertained which position of the reversing switch I88 on the automobilecontrols which door, the switch may be calibrated accordingly forconvenience of the operator. Operating the movable reed 51 of theimpulse responsive relay IBI successively in a given direction, eitherto the right or to the left, operates to energize the circuits whichwere previously prepared by the corresponding reversing switch I6 or 2I6to open and close the door, in the manner which was previously describedwith reference to the single door embodiment and will therefore not berepeated.

In accordance with my simplified arrangement,

it is not necessary to duplicate all the apparatus of the system, andthe two doors are controlled selectively from the single relay I6 I.Also by this arrangement a single impulse energizing circuit and buriedcoil in the driveway is suffl'cient for selective control of both doors.Furthermore, when a two door garage is approached by a single drivewayit is possible, in accordance with my two door control system, to plantthe lmpulsing coil in the single driveway an appreciable distance fromthe garage.

The manual impulser in the house may be operated to generate impulses ofeither polarity for operating either door. By pressing the magnet I55 inquickly, an impulse of a predetermined polarity is generated. When it isallowed to snap .out, an impulse of the opposite polarity is generated.Hence, ii the switch I 49 is closed aiter the magnet is depressed, theimpulse generated by depressing the magnet is not applied to the relay.Also it is possible to depress the magnet so slowly that the impulsegenerated is too feeble to operate the relay, which is then ready tooperate in the opposite direction when the magnet I is projected rapidlyfrom its coil.

As shown in Figs. 1 and '7, my door control system is adapted foroperating a shunt type motor, but the connections are convenientlyrearranged for energizing a series type motor, as shown in Fig. 9. Forthis the motor armature terminal N19 is connected through a conductor26! to the main line conductor L2. The motor armature terminal 89 isconnected by a conductor 263 to the stationary contact 29 on thereversing switch l6, and. from its stationary contact 3| a conductor 264is extended for permanent connection on conductor I05 and relay contact83. By this arrangement the operation of the reversing switch l6reversably connects the field of the motor in series with its armatureand the series circuit from line Li is completed by the engagement ofthe impulse relay bridging contact 15 with the stationary contacts 8|and 83.

As shown in Fig. 10, my control system of Fig. 1 is readily adapted forcontrolling the operation of a split phase induction motor M comprisingfield windings MFI and MP2. This control is readily accomplished byconnecting the conductor I01 leading from the conductor 105 to thepermanently joined ends of the motor field windings; The reverse fieldenergizing conductors Ill and H5 of the system are then connected to theother ends oi the fleld windings MFI and MR2 of the motor. From thepermanent contact 3| on the reversing switch It a conductor 263 isconnected to one side of a large condenser C, or other phase shifting.impedance device, which is connected from its other side through aconductor 28!! to the conductor 93 of the system. By the movement of thereversing switch arm I! the impedance device 0 is thus alternativelyconnected in series between the main line L2 and either one or the otherof the motor field windings MFI or. MP2, the other one being connecteddirectly to the service line L2. When the relay moves its contact ll toengage the adjacent stationary contacts the motor circuit is thuscompleted for operation in either direction corresponding to theposition of the reversing switch IO.

Aside from the specific embodiments of the invention herein shown anddescribed, it will be readily understood the contacts and connections orthe switch and the relay may be rearranged to control various types 01electrical apparatus and numerous details 01' the construction may bealtered or omitted without departing from the spirit and'scopeot theinvention as disclosed andclaimed,andthat1donotdesiretolimittheinvention to the exact constructions herein set forth.

I claim:

1. A garage door operating system having in combination, a pair ofdoors, a pair of motors, driving mechanism associated with each motorwhereby a corresponding one of the doors is moved to opened or closedpositions accordingly as the associated motor is operated in onedirection or another, a source of electrical energy, switch meansoperated in accordance with the movement of each door for preparingreverse energizing circuits for the associated motor, a polarized relayfor completing the motor energizing circuit last prepared for eithermotor by the associated switch means, a remote control circuit foractuating said relay, and means associated with said control circuit forproviding current of selective polarity for actuating the relay tooperate a selected one of the motors to open a corresponding one of thedoors.

2. A garage door operating system having in combination, two doors, twomotors, a driving mechanism associated with each of said motors foropening and closing a corresponding one of said doors as the motor isactuated in one direction or another, a source of electrical energy,switch means associated with each of said doors for preparing reverselyenergizing circuits from the source to the respective associated motor,a polarized relay, front contacts on said relay for energizing thecircuits prepared for one of said motors, back contacts on said relayfor energizing the circuits prepared for the other one of said motors, aremote control circuit for actuating said relay, and means forselectively inducing impulses of suitable polarity for actuating saidpolarized relay to selectively operate either motor to open or close itsassociated door.

3. A garage door operating system having in combination, two doors, twomotors, a driving mechanism associated with each of said motors foropening and closing a corresponding one oi said doors as the motor isactuated in one direction or another, a source of electrical energy,switch means associated with each of said doors for preparing reverselyenergizing circuits from the source to the respective associated motor,a-

polarized relay, front contacts on said relay for energizing thecircuits prepared for one oi said motors, back contacts on said relayfor energizing the. circuits prepared for the other one of said motors,a remote control circuit for actuating said relay, a solenoid insaidcontrol circuit, a reversely magnetizable inducing member adapted to becarried adjacent said solenoid for inducing current impulses oi suitablepolarity for actuating said polarised relay to selectively operateeither motor to open or close its associated door.

WARREN 1'. mm.

